package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

/**
 * @author xiaobai
 * @create 2024-01-27 17:09
 */

@Service
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Autowired
    private DishMapper dishMapper;


    /*
     * 新增套餐和对应菜品
     * */
    public void saveWithDish(SetmealDTO setmealDTO) {

        //新增套餐基本信息  不包含菜品
        Setmeal setmeal = new Setmeal();

        //属性拷贝
        BeanUtils.copyProperties(setmealDTO, setmeal);

        //插入套餐基本信息
        setmealMapper.insert(setmeal);


        //获取插入的套餐id
        Long setmealId = setmeal.getId();


        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();

        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });

        setmealDishMapper.insertBatch(setmealDishes);


    }

    /*
     * 套餐分页查询
     * */
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(), setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> page = setmealMapper.pageQuery(setmealPageQueryDTO);

        return new PageResult(page.getTotal(), page.getResult());

    }

    /*
     * 套餐批量删除
     * */


    @Transactional
    public void deleteBatch(List<Long> ids) {

        for (Long id : ids) {
            Setmeal setmeal = setmealMapper.getById(id);
            //逐个判断是否在启售状态
            if (setmeal.getStatus() == StatusConstant.ENABLE) {
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);

            }

        }

        //在套餐表中删除套餐
        setmealMapper.deleteByIds(ids);
        //在套餐菜品表中删除套餐关联的菜品
        setmealDishMapper.deleteByDishIds(ids);


    }

    /*
     * 根据ID查询套餐信息和关联的菜品信息
     * */
    public SetmealVO getByIdWithDish(Long id) {
        //根据套餐ID查询套餐 获取套餐对象
        Setmeal setmeal = setmealMapper.getById(id);

        //根据套餐ID查询对应的菜品信息
        List<SetmealDish> setmealDishes = setmealDishMapper.getBySetmealId(id);

        SetmealVO setmealVO = new SetmealVO();

        //属性拷贝
        BeanUtils.copyProperties(setmeal, setmealVO);
        setmealVO.setSetmealDishes(setmealDishes);


        return setmealVO;
    }

    /*
     * 修改套餐和关联的菜品信息
     * */

    @Transactional
    public void updateWithDish(SetmealDTO setmealDTO) {
        //修改套餐的基本信息
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);
        setmealMapper.update(setmeal);

        //修改套餐中关联的菜品信息
        //删除套餐和菜品的关联关系
        Long setmealId = setmealDTO.getId();
        setmealDishMapper.deleteById(setmealDTO.getId());

        //获取菜品集合  重新插入菜品信息
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();


        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealDTO.getId());
        });


        //重新插入套餐和菜品的关联关系
        setmealDishMapper.insertBatch(setmealDishes);

    }


    /*
     * 套餐的启售和停售
     * */

    @Transactional
    public void startOrStop(Integer status, Long id) {
        //起售套餐时，判断套餐内是否有停售菜品，有停售菜品提示"套餐内包含未启售菜品，无法启售"
        if (status == StatusConstant.ENABLE) {
            //获取启售套餐中包含的菜品信息
            List<Dish> dishList = dishMapper.getBySetmealId(id);
            //判断是否有停售的菜品
            dishList.forEach(dish -> {
                if (StatusConstant.DISABLE == dish.getStatus()) {

                    throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                }
            });
        }
        Setmeal setmeal = Setmeal.builder()
                .id(id)
                .status(status)
                .build();

        setmealMapper.update(setmeal);


    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}
